Hanmoku

Hanmoku refers to a half-point margin, the smallest possible difference in a game’s outcome. This term is particularly relevant in scoring systems that use fractional komi, such as Japanese and Korean rules, where White is awarded 6.5 or 7.5 points to prevent ties. A game decided by hanemoku highlights the precision and balance required in high-level Go, and the term is sometimes used interchangeably with hanemoku shobu (半目勝負) to describe a half-point win.

In a hanmoku game, every move in the endgame becomes critical. A single unnecessary play or a minor miscalculation can tip the balance, turning a potential win into a loss. This concept underscores the importance of precise endgame play and meticulous territory calculation, as even the tiniest details can decide the outcome.

Historically, professional games decided by half-point victories have been celebrated as remarkable displays of skill. They highlight the delicate balance of strategy, foresight, and calculation required at the highest levels of Go. Such close outcomes have become possible largely due to the introduction of komi, which ensures a fairer and more balanced game.